We made the bad decision to remove the brick from our fireplace hearth extension and replace it with tile. When removing it, the concrete underneath was badly damaged and had to be removed. What was left was a gaping hole above our crawlspace (steel supports around perimeter only are still in place, just concrete base for the original brick is gone). In researching how to fix this, we realize we need to pour new concrete and cannot use plywood as a bottom base, but are uncertain how to do this over a crawlspace.
Any advise on how to support the recommended 4" of concrete? Can we put down something underneath it to support the concrete like durock? If we use wood posts to prop up the bottom until the concrete cures, when we remove the wood will it hold and be strong enough to support tile and bear weight? Ideas to make it strong? THANK YOU!
Any advise on how to support the recommended 4" of concrete? Can we put down something underneath it to support the concrete like durock? If we use wood posts to prop up the bottom until the concrete cures, when we remove the wood will it hold and be strong enough to support tile and bear weight? Ideas to make it strong? THANK YOU!
